Hydrochloric Acid → 5-(Chloroacetyl)-1,3-dihydro-2H-indol-2-one

Participants

Reaction Conditions

Reaction Steps

2-Oxindole (6.7 g) was added to a suspension of aluminum chloride (23 g) in dichloroethane (30 ml) cooled in an ice bath. Chloroacetyl chloride (11.3 g) was slowly added and hydrogen chloride gas was evolved. After ten minutes of stirring, the reaction was warmed to 40-50° C. for 1.5 hours. The mixture was cooled to room temperature and poured into ice water. The precipitate was collected by vacuum filtration, washed with water and dried under vacuum to give 10.3 g (98%) of 5-chloroacetyl-2-oxindole as an off-white solid.

Provenance & Evidence